Usually, a pharmacy can give you a few days supply to hold you over, as long as it isn't a narcotic. I run into this occasionally and they spot me a few lithium to keep my head straight......I suck with tracking my medication. But in the interest of full disclosure, they once gave me high blood pressure medication by accident. Duh.

Anyway, talk directly to the pharmacist and rap what's up. They might even be able to track down your p-doc. That's what they do.